/Engine/Source/Runtime/Core/Public/Misc/EnumRange.h
for (ECountedThing Val : TEnumRange()) { ... }
template<typename EnumType> struct TEnumRange : public [NEnumRangePrivate::TEnumRange_Impl< EnumType, NEnumRangePrivate::TEnumRangeTraits< EnumType >::RangeType >](API\Runtime\Core\Misc\TEnumRange_Impl)